# Sweep25 — semantic multi-view body and part frames

The owner requests front/side/overhead evidence and essential motion reproduction, with mechanical fitting prohibited. See SOURCE_REVIEW.md and the hash-bound source selection. Body, head and prop anatomy remain original; generated changes of shape/pigment/feet/face are not copied.

## Kinematic responsibilities

- The floor supports the actual displayed paws throughout. No stepping or whole-character translation is authored.
- The torso/thigh surface turns as one rigid volume about the inherited low body pivot. An authored forward inclination prepares work; a small leftward heading directs the stroke inward, with smaller side inclination. This is not a torso bend or a mesh scale.
- Original shoulders remain in the same body-relative places. Each arm first evaluates its existing shoulder orientation and broad elbow curvature in that local body frame, with unchanged material length/sections. Then one identical three-axis torso transform moves every arm vertex and both shoulder roots. No axis angle is added to Swing to approximate a general rotation.
- The neck carrier follows the torso frame. Local neck pitch attends to the floor with a short delay, and small relative neck yaw reflects overhead evidence that head and tail do not share one identical orientation.
- The hand retains the same material point on the unchanged broom. Compute the world grip after body/arm transforms, solve blade-floor inclination from that grip, then orient the tool in the body's floor heading. Light bristle trailing and lifted returns keep separate load roles.
- The free arm retains its neutral local pose; the existing attachment overlap is preserved. The tail is rigidly body-bound in this revision; there is no additional tail wave.

## Authored pilot score

Keep the liked oblique original's three outward extrema2.03/3.03/4.03s and the established smooth preparation/return timing. Work-posture and stroke envelopes produce forward body pitch3–5degrees, side inclination-1 to-1.8degrees and heading-6 to-9degrees while working. Head-local pitch is6–7.5degrees, with local heading-2 to-3degrees. These values are conservative design choices for the original native; they are not measured angles or optimizer output. Body coupling scales the entire common frame independently of local arm action, allowing edit/reset verification.

The existing short-arm action is retained: shoulder swing, forward direction and broad elbow opening generate the reach. True body/arm covariance changes its world path. Keep the same fixed grip and broom dimensions. Four-view native keys must establish visible body/paw joins, root attachment, forward/inward tool travel and natural silhouette before full media.

## Verification and limits

Cheap tests verify right-handed orthogonal axes, X/Y/Z ordering, distances, inverse transport, unchanged local arm controls when body coupling is disabled, floor contact and smooth timing. Native checks compare actual geometry with independent FK and rigid transforms, including all visible head members and joined paws. Save/reopen/edit/reset and complete four-view output follow the reviewed pilot. Record source/code/native hashes. No external solver, video-coordinate optimizer, per-frame fitting, adopted release replacement or runtime export is involved.

Generated views are independent. Front/side support repeated work; top-r03 supports direction/occlusion but has one broad visible arc. The owner-liked oblique original governs rhythm. Hidden shoulder/torso positions cannot be measured from overhead. Keep these limits visible in the comparison.